"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : DMS分布式锁
Case Name   : 获取X锁在savepoint之后，回滚到保存点，备机可查询
Create At   : 2023/4/24
Owner       : opentestcase033
Description :
    1.创建测试表
    2.主节点开启事务，insert，savepoint，重命名表，回退保存点
    3.备节点查询表
    4.清理环境
Expect:
    1.成功
    2.执行成功
    3.1条数据，回退保存点后第二次查询成功
    4.成功
History     :
"""

import os
import time
import unittest

from testcase.utils.Logger import Logger
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.ComThread import ComThread


class DmsOck(unittest.TestCase):

    def setUp(self):
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.constant = Constant()
        self.table = 't_dms_ock_0043'

    def test_dms_ock(self):
        text1 = '-----step1:创建测试表;expect:成功-----'
        self.log.info(text1)
        create_tb = f"drop table if exists {self.table} cascade;" \
                    f"create table {self.table}(" \
                    f"id int, name varchar, source number) with(segment=on);" \
                    f"insert into {self.table} values(1, 'haha', 92);"
        create_tb_res = self.pri_sh.execut_db_sql(create_tb)
        self.log.info(create_tb_res)
        self.assertTrue(self.constant.CREATE_TABLE_SUCCESS in create_tb_res
                        and self.constant.INSERT_SUCCESS_MSG in create_tb_res,
                        f"执行失败:{text1}")

        text2 = '-----step2:主节点开启事务，insert，savepoint，重命名表，' \
                '回退保存点;expect:执行成功-----'
        self.log.info(text2)
        sql1 = f"start transaction;" \
               f"insert into {self.table} values(3, 'doudou', 90);" \
               f"savepoint insert_point;" \
               f"select pg_sleep(3);" \
               f"alter table {self.table} rename to new_{self.table};" \
               f"select pg_sleep(3);" \
               f"rollback to savepoint insert_point;"
        session1 = ComThread(self.pri_sh.execut_db_sql, args=(sql1,))
        session1.setDaemon(True)
        session1.start()
        time.sleep(1)

        text3 = '-----step3:备节点查询表;expect:1条数据，回退保存点后第二次查询成功-----'
        self.log.info(text3)
        sql2 = f"select * from {self.table};" \
               f"select pg_sleep(3);" \
               f"select locktype, relname, mode from pg_locks, pg_class " \
               f"where relation = oid and relname = '{self.table}';" \
               f"select * from {self.table};"
        session2 = ComThread(self.pri_sh.execut_db_sql, args=(sql2,))
        session2.setDaemon(True)
        session2.start()
        session1.join(10)
        session2.join(10)
        res1 = session1.get_result()
        self.log.info(f'session1_results: {res1}')
        res2 = session2.get_result()
        self.log.info(f'session2_results: {res2}')
        self.assertIn(self.constant.INSERT_SUCCESS_MSG, res1, f"执行失败:{text2}")
        self.assertIn(self.constant.ALTER_TABLE_MSG, res1, f"执行失败:{text2}")
        self.assertIn('SAVEPOINT', res1, f"设置保存点失败:{text2}")
        self.assertIn(self.constant.ROLLBACK_MSG, res1, f"执行失败:{text2}")
        self.assertIn('1 | haha |     92', res2.splitlines()[-2],
                      f"执行失败:{text3}")

    def tearDown(self):
        text4 = '-----step4:清理环境 expect:成功-----'
        self.log.info(text4)
        drop_tb_res = self.pri_sh.execut_db_sql(
            f"drop table if exists {self.table} cascade;")
        self.log.info(drop_tb_res)
        self.assertIn(self.constant.DROP_TABLE_SUCCESS,
                      drop_tb_res, f"删表失败:{text4}")
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
